/*
 * File      : region.h
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rt-thread.org/license/LICENSE
 *
 * Change Logs:
 * Date           Author       Notes
 * 2009-10-16     Bernard      first version
 */
#ifndef __RTGUI_REGION_H__
#define __RTGUI_REGION_H__

#include <rtgui/rtgui.h>

#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif

    typedef struct rtgui_region_data rtgui_region_data_t;

    struct rtgui_region_data
    {
        rt_uint32_t size;
        rt_uint32_t numRects;
        /* XXX: And why, exactly, do we have this bogus struct definition? */
        /* rtgui_rect_t rects[size]; in memory but not explicitly declared */
    };

    typedef struct rtgui_region
    {
        rtgui_rect_t          extents;
        rtgui_region_data_t  *data;
    } rtgui_region_t;

    typedef enum
    {
        RTGUI_REGION_STATUS_FAILURE,
        RTGUI_REGION_STATUS_SUCCESS
    } rtgui_region_status_t;

    /* creation/destruction */

    void rtgui_region_init(rtgui_region_t *region);
    void rtgui_region_init_rect(rtgui_region_t *region,
                                int x, int y, unsigned int width, unsigned int height);
    void rtgui_region_init_with_extents(rtgui_region_t *region, const rtgui_rect_t *extents);
    void rtgui_region_fini(rtgui_region_t *region);

    void rtgui_region_translate(rtgui_region_t *region, int x, int y);

    rtgui_region_status_t rtgui_region_copy(rtgui_region_t *dest, rtgui_region_t *source);

    rtgui_region_status_t rtgui_region_intersect(rtgui_region_t *newReg, rtgui_region_t *reg1, rtgui_region_t *reg2);
    rtgui_region_status_t rtgui_region_intersect_rect(rtgui_region_t *newReg, rtgui_region_t *reg1, rtgui_rect_t *rect);
    rtgui_region_status_t rtgui_region_union(rtgui_region_t *newReg, rtgui_region_t *reg1, rtgui_region_t *reg2);
    rtgui_region_status_t rtgui_region_union_rect(rtgui_region_t *dest, rtgui_region_t *source, rtgui_rect_t *rect);
    rtgui_region_status_t rtgui_region_subtract(rtgui_region_t *regD, rtgui_region_t *regM, rtgui_region_t *regS);
    rtgui_region_status_t rtgui_region_subtract_rect(rtgui_region_t *regD, rtgui_region_t *regM, rtgui_rect_t *rect);
    rtgui_region_status_t rtgui_region_inverse(rtgui_region_t *newReg, rtgui_region_t *reg1, rtgui_rect_t *invRect);

    int rtgui_region_num_rects(rtgui_region_t *region);

    rtgui_rect_t *rtgui_region_rects(rtgui_region_t *region);

#define RTGUI_REGION_OUT    0
#define RTGUI_REGION_IN     1
#define RTGUI_REGION_PART   2

    int rtgui_region_contains_point(rtgui_region_t *region, int x, int y, rtgui_rect_t *box);
    int rtgui_region_contains_rectangle(rtgui_region_t *rtgui_region_t, rtgui_rect_t *prect);

    int rtgui_region_not_empty(rtgui_region_t *region);
    rtgui_rect_t *rtgui_region_extents(rtgui_region_t *region);

    rtgui_region_status_t rtgui_region_append(rtgui_region_t *dest, rtgui_region_t *region);
    rtgui_region_status_t rtgui_region_validate(rtgui_region_t *badreg, int *pOverlap);

    void rtgui_region_reset(rtgui_region_t *region, rtgui_rect_t *rect);
    void rtgui_region_empty(rtgui_region_t *region);
    void rtgui_region_dump(rtgui_region_t *region);
    int rtgui_region_is_flat(rtgui_region_t *region);

    /* rect functions */
    extern rtgui_rect_t rtgui_empty_rect;

    void rtgui_rect_moveto(rtgui_rect_t *rect, int x, int y);
    void rtgui_rect_moveto_align(rtgui_rect_t *rect, rtgui_rect_t *to, int align);
    void rtgui_rect_inflate(rtgui_rect_t *rect, int d);
    void rtgui_rect_intersect(rtgui_rect_t *src, rtgui_rect_t *dest);
    int  rtgui_rect_contains_point(const rtgui_rect_t *rect, int x, int y);
    int  rtgui_rect_is_intersect(const rtgui_rect_t *rect1, const rtgui_rect_t *rect2);
    int  rtgui_rect_is_equal(const rtgui_rect_t *rect1, const rtgui_rect_t *rect2);
    rt_bool_t rtgui_rect_is_empty(const rtgui_rect_t *rect);

#if defined(__cplusplus) || defined(c_plusplus)
}
#endif

#endif /* _PIXMAN_H_ */
